fix linting issues

Co-authored-by: Vedant Mahajan <[email protected]>

Author: hemang1404

tuf/ngclient/urllib3_fetcher.py

@@ -51,8 +51,9 @@ def __init__(
         if app_user_agent is not None:
             ua = f"{app_user_agent} {ua}"
 
-        # Configure retry strategy: retry on read timeouts and connection errors
-        # This enables retries for streaming failures, not just initial connection
+        # Configure retry strategy: retry on read timeouts and
+        # connection errors. This enables retries for streaming failures,
+        # not just initial connection.
         retry_strategy = Retry(
             total=3,
             read=3,
@@ -175,4 +176,4 @@ def download_bytes(self, url: str, max_length: int) -> bytes:
 
         if last_exception:
             raise last_exception
-        raise exceptions.DownloadError(f"Failed to download {url}")
+        raise exceptions.DownloadError(f"Failed to download {url}")